Asymmetric Brake Pad Gravity Offset for Utility Vehicle Disk Brakes
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Solution Overview
Problem
Existing pneumatically or electromechanically actuated disk brakes for utility vehicles experience oblique wear due to the high dead weight and robust construction, leading to uneven lining wear, especially when installed in skewed positions relative to the wheel axis.
Innovation Solution
The disk brake design includes a brake disk with a preferred direction of rotation, a brake carrier, and a brake caliper, with both the fastening-side and rim-side brake pads having their lines of gravity offset with respect to the central axis, allowing for even wear distribution by supporting the pads against specific regions of the brake carrier, and utilizing a pressure-exerting device with a central axis aligned with the brake's axial direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the brake is designed with high dead weight and robust cast construction for utility vehicles, then the brake can handle heavy loads and provide reliable braking, but the high weight causes the sliding caliper to skew during installation, leading to oblique wear and uneven lining application
Solution Approach 1:
The patent applies asymmetry by offsetting the line of gravity of the brake lining relative to the central axis of the pressure-exerting device. This intentional asymmetric positioning creates a counterbalancing moment that compensates for the skewing effect caused by the heavy caliper weight, thereby preventing oblique wear while maintaining the robust construction necessary for utility vehicle applications
2Adaptability or versatility
If the brake is installed in skewed positions relative to the wheel axis (e.g., 9 o'clock or 3 o'clock positions), then the brake can be accommodated in different vehicle configurations, but the high dead weight causes the caliper to adopt a skewed position, resulting in uneven lining application and tangential oblique wear
Solution Approach 1:
The asymmetric offset of the brake lining's line of gravity creates a compensating moment that maintains uniform lining application regardless of the brake's installation position. This allows the brake to be installed in various skewed positions while preventing oblique wear through the gravitational counterbalancing effect
3Device complexity
If a single pressure-exerting device is used to actuate both brake pads, then the device complexity is reduced, but the high dead weight of the brake causes the caliper to skew, leading to uneven force distribution and oblique wear
Solution Approach 1:
The patent uses a single pressure-exerting device for simplicity but compensates for the skewing effect by asymmetrically positioning the brake lining's line of gravity. This creates a counterbalancing moment that ensures even force distribution and prevents oblique wear, maintaining both simplicity and effectiveness
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively reduces or eliminates oblique wear by ensuring even friction material application and distributing braking moments across the brake carrier, regardless of the brake's installation position, thereby enhancing the durability and performance of the disk brake.
Implementation Method 1
a fastening-side brake pad (25) with friction material (27)... a rim-side brake pad (28) with friction material (30)
Data Source
AI summary
A pneumatically or electromechanically actuated disk brake includes a brake disk having a preferred direction of rotation in forward travel, a brake carrier extending around the brake disk, a brake caliper extending around the brake disk, a fastening-side brake pad with a friction material, an application device having a pressure-exerting device on one side of the brake disk, and a rim-side brake pad with friction material. A fastening-side line of gravity, in the rest state of the brake, is arranged with a predetermined first offset with respect to a central axis in the direction of the entry side of the brake disk in the preferred direction of rotation. A rim-side line of gravity is arranged either with a predetermined second offset with respect to the central axis, the second offset being unequal to the first offset, or with a third offset with respect to the central axis.